Contactor assembly for distribution board

Abstract

A contactor assembly is connected to a bus-bar of a main circuit-breaker. The assembly includes a housing including an opening defined therein; a contactor passing through the opening, wherein the contractor includes contacting portions projecting forwardly of the opening and coupled portions projecting rearwardly of the opening; a presser passing through the opening, wherein the presser is interposed between the contactor and the housing, wherein the presser is supported on the housing and presses the contacting portions and the coupled portions; and a connector coupled to the coupled portions of the contactor and electrically connected to the contactor.

What is claimed is: 
     
       1. A contactor assembly connected to a bus-bar of a main circuit-breaker, the assembly including:
 a housing including an opening defined therein; 
 a contactor passing through the opening and coupled to the housing, wherein the contactor includes contacting portions projecting forwardly of the opening and coupled portions projecting rearwardly of the opening; 
 a presser passing through the opening and coupled to the housing, wherein the presser is interposed between the contactor and the housing, wherein the presser is supported on the housing and presses the contacting portions and the coupled portions; and 
 a connector coupled to the coupled portions of the contactor and electrically connected to the contactor, 
 wherein the connector includes a protrusion protruding outwardly therefrom and having a circular cross section, wherein the protrusion is configured to be fitted into a space between the coupled portions, wherein the contactor is configured to rotate around the protrusion, 
 wherein the housing includes side guards defining both side boundaries of the opening respectively, wherein the connector is connected to the coupled portions while the coupled portions and at least a portion of the connector are received between the side guards, wherein each of the side guards includes a spacer protruding toward a center of the opening, wherein each of both sides of the contactor contacts each spacer such that each of the both sides of the contactor is spaced apart by a predetermined gap from each of the side guards. 
 
     
     
       2. The contactor assembly of  claim 1 , wherein the contactor includes a first contacting branch and a second contacting branch, wherein the first contacting branch and the second contacting branch have middle portions received in the opening and being in contact with each other, wherein front ends of the first contacting branch and the second contacting branch in front of the opening are spaced from each other by a first predefined spacing, while rear ends of the first contacting branch and the second contacting branch in the rear of the opening are spaced from each other by a second predefined spacing. 
     
     
       3. The contactor assembly of  claim 2 , wherein the first contacting branch and the second contacting branch include the coupled portions respectively. 
     
     
       4. The contactor assembly of  claim 2 , wherein the first contacting branch and the second contacting branch include the contacting portions respectively, wherein an end of the bus-bar is configured to be fitted into a space between the contacting portions. 
     
     
       5. The contactor assembly of  claim 2 , wherein the presser includes:
 a first pressing piece sandwiched between the first contacting branch and the housing; and 
 a second pressing piece sandwiched between the second contacting branch and the housing. 
 
     
     
       6. The contactor assembly of  claim 1 , wherein each of the side guards is a plate-like member having a plane perpendicular to an imaginary plane defined by the opening, and the side guards define both sides of the opening respectively.